ST22M, ST22R Hard Disk/Floppy Controller Settings and Configuration
SEAGATE TECHNOLOGY INC.
ST22M, ST22R
Data bus: 16-bit, ISA
Size: Half-length, full-height card
Hard drives supported: ST22M: Two MFM ST506/412 drives
ST22R: Two RLL ST412 drives
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
CONNECTIONS | |
Function | Location |
34-pin control cable connector- floppy drive | J1 |
34-pin control cable connector-hard drive | J2 |
20-pin data cable connector-drive 0 | J3 |
20-pin data cable connector-drive 1 | J4 |
4-pin connector-drive active LED | J5 |
5-pin connector-DC power | J6 |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
| » | BIOS enabled | JP3 | open |
BIOS disabled | JP3 | closed | |
| » | Floppy drive enabled | JP4 | closed |
Floppy drive disabled | JP4 | open | |
I/O AND BIOS ADDRESS | |||||
HD Port Address | FD Port Address | BIOS Address | JP1 | JP2 | |
| » | 1F0-1F7, 3FF-3F7 | 3F0-3F5, 3F7 | C800-CBFF | open | open |
1F0-1F7, 3F6-3F7 | 3F0-3F5, 3F7 | CC00-CFFF | open | closed | |
170-177, 376-377 | 370-375, 377 | D800-DBFF | closed | open | |
170-177, 376-377 | 370-375, 377 | DC00-DFFF | closed | closed | |
DRIVE PARAMETERS SUPPORTED BY THE ST22M | |||
Capacity | Heads | Cylinders | SPT |
21.4 | 4 | 615 | 17 |
32.1 | 6 | 615 | 17 |
42.5 | 5 | 977 | 17 |
42.8 | 6 | 820 | 17 |
44.5 | 5 | 1024 | 17 |
80.2 | 9 | 1024 | 17 |
DRIVE PARAMETERS SUPPORTED BY THE ST22R | |||
Capacity | Heads | Cylinders | SPT |
21.1 | 2 | 667 | 31 |
32.7 | 4 | 615 | 26 |
42.9 | 4 | 667 | 31 |
49.1 | 6 | 615 | 26 |
65.5 | 6 | 820 | 26 |
122.7 | 9 | 1024 | 26 |
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